An interview with former Managing Director at the Chicago Board of Trade and author of Zero-Sum Game, Erika Olson. Erika Olson was a newly hired managing director at the Chicago Board of Trade (CBOT) when the Chicago Mercantile Exchange (CME) made an $8 billion offer to buy the company in October 2006. Her book, Zero-Sum Game: The Rise of the World’s Largest Derivatives Exchange, is based on detailed notes she took over the course of a year as a bidding war between CME and IntercontinentalExchange (ICE) erupted for CBOT. Now that the same futures executives in Olson’s book are helping…